136ac495dSmrg // Low-level functions for atomic operations: sh version -*- C++ -*- 236ac495dSmrg 3*8feb0f0bSmrg // Copyright (C) 1999-2020 Free Software Foundation, Inc. 436ac495dSmrg // 536ac495dSmrg // This file is part of the GNU ISO C++ Library. This library is free 636ac495dSmrg // software; you can redistribute it and/or modify it under the 736ac495dSmrg // terms of the GNU General Public License as published by the 836ac495dSmrg // Free Software Foundation; either version 3, or (at your option) 936ac495dSmrg // any later version. 1036ac495dSmrg 1136ac495dSmrg // This library is distributed in the hope that it will be useful, 1236ac495dSmrg // but WITHOUT ANY WARRANTY; without even the implied warranty of 1336ac495dSmrg // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1436ac495dSmrg // GNU General Public License for more details. 1536ac495dSmrg 1636ac495dSmrg // Under Section 7 of GPL version 3, you are granted additional 1736ac495dSmrg // permissions described in the GCC Runtime Library Exception, version 1836ac495dSmrg // 3.1, as published by the Free Software Foundation. 1936ac495dSmrg 2036ac495dSmrg // You should have received a copy of the GNU General Public License and 2136ac495dSmrg // a copy of the GCC Runtime Library Exception along with this program; 2236ac495dSmrg // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 2336ac495dSmrg // <http://www.gnu.org/licenses/>. 2436ac495dSmrg 2536ac495dSmrg // Use the default atomicity stuff, which will use __atomic* builtins 2636ac495dSmrg // if threads are available, or the *_single functions on single-thread 2736ac495dSmrg // configurations. 2836ac495dSmrg // Actually we wouldn't need this header at all, but because of PR 53579 2936ac495dSmrg // libstdc++'s configury will not pickup the -matomic-model= option when 3036ac495dSmrg // set in the environment. This makes it impossible to enable the proper 3136ac495dSmrg // atomic model on SH without modifying GCC itself, because libstdc++ always 3236ac495dSmrg // thinks the target doesn't do any atomics and uses the default mutex based 3336ac495dSmrg // implementation from cpu/generic/atomicity_mutex. 3436ac495dSmrg 3536ac495dSmrg #include <ext/atomicity.h> 36